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Pathogens
Antimicrobials
Patients must have no indications for hospitalization.
Indications for Hospitalization
Age less than 2 months
Sepsis (e.g. toxic appearance, hypotension, poor capillary refill)
Immunocompromised patient
Vomiting or inability to tolerate oral medication
Lack of adequate outpatient follow-up (eg, no telephone, live far from hospital)
Failure to respond to outpatient therapy
Genitourinary abnormalities
E. coli (80%)
S. saprophyticus
K. pneumoniae
P. mirabilis
Enterococcus spp.
Cephalexin 12 mg/kg/dose PO q6h
Max: 1g/dose (4g/day)
OR
Amoxicillin-clavulanate 15 mg amoxicillin/kg/dose PO q8h
Max: 250-875 mg/dose amoxicillin (750-1750 mg/day)
Use 7:1 formulation Clavulin®-200 (40 mg/mL) Clavulin®-400 (80 mg/mL)
Additional Amoxicillin-Clavulanate Notes
Tablets not recommended in children less than 12 years old due to higher ratio of clavulanic acid to amoxicillin. Tablets are not equivalent to suspension.
Various formulations of suspension exist and are not all equivalent.
BID dosing is preferred for the 40 mg/mL suspension (Clavulin®-200)
To reduce gastrointestinal upset:
Administer with food
Limit clavulanic acid to approximately 10 mg/kg/day if possible
Use BID dosing schedule to reduce diarrhea
Trimethoprim-sulfamethoxazole 4 mg trimethoprim/kg/dose PO q12h
Use only in greater than/equal to 2 months old)
Max: 160 trimethoprim/dose
Additional TMP-SMX Notes
Avoid use in infants less than 2 months old unless other options are not available (do not use in infants less than 1 month old).
Sulfa antibiotics may displace bilirubin from protein binding sites, potentially leading to hyperbilirubinemia and kernicterus in neonates and young infants.
Febrile UTI 7-10 days
Afebrile UTI: 3-5 days